Watch case



FIG. 1 is a front perspective view of a watch case showing my new design;

FIG. 2 is a left side view thereof;

FIG. 3 is a right side view thereof;

FIG. 4 is a bottom view thereof; and,

FIG. 5 is a top view thereof.

The material shown in broken lines is not part of the claimed design. 

The ornamental design for a watch case, as shown and described. 